Greenfield called the "heavy" movie a "rewarding" change from his usual comedy.

"You do 'New Girl,' you play a character like Schmidt, you crave as an actor afterwards to just do something different," he said. "Then you look at what material is out there and felt very fortunate to find this and that they would have me."

The versatile actor added that his 4-year-old daughter Lilly is simply "the best."

"She's the best, man. She keeps a lot of it grounded," he said. "You come home, you're like 'Whatever, let's go hang out!'"

He added that she still doesn't fully understand how big of a deal her father is.

"I don't know that she fully gets it," he said. "She knows that I'm on a TV show, she'll be like 'Daddy you play Schmidt' There's a big part of me that's very proud of it and goes 'Daddy's really happy.' but another part, that's like 'Just stay away from that as long as you can.' But she seems unfazed by it."